I'm playing through warhead at the moment with my new gtx295, all settings enthusiast except for physics. 2xAA ingame and 2xAA "enhance the application setting" in forceware control panel and it stays smooth most of the time.

not sure crysis graphics level is amazing compared to Stalker Clear Sky. The textures are definintely nicer in clear sky

I am actually doing alright in the flying section, but the afterburners are bothering me. I feel NOTHING when i press left shift. Literally nothing. I dont go faster or anything like that. Are you supposed to press only when you are doing a special maneuver?